# syntax=docker/dockerfile:1
FROM alpine:latest as base

# Build Stage:
FROM base AS build
RUN apk add git build-base
RUN git clone https://undercroft.ocathain.ie/barra/the-worlds-least-useful-clock.git
RUN gcc the-worlds-least-useful-clock/the-worlds-least-useful-clock.c

# Final Stage:
FROM base AS final
COPY --from=build a.out /bin/useless-clock
ARG UID=10001
RUN adduser \
    --disabled-password \
    --gecos "" \
    --home "/nonexistent" \
    --shell "/sbin/nologin" \
    --no-create-home \
    --uid "${UID}" \
    appuser
USER appuser
COPY --from=build a.out /bin/useless-clock
ENTRYPOINT [ "/bin/useless-clock" ]